Shears.



No. 883,457. PATENTED MAR. a1, 1908:

SHBARS,

APPLICATION FILED 1310.19, 1907.

mwsses: 'fnv 8m):

' the shear,

CHARLES GEIS, OF WILKINSBURG, PENNSYLVANlA.

SHEARS.

Specification in Letters Patent.

Patented March, 31, 1908.

Appin tion filed December 19, 1907. SerialNo. 407,120.

To all whom it may concern:

Be it known that I, CHARLES GErs, a citizen of the United States, residing at Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful" Improvements in Shears, of which the following is a specification, reference being had, therein "0 the accompanying draw- My invention refers-to an improvement in shears, more particularly shears for cutting sheet metal or any similar hard resisting metal, and it has for its object to provide a device wherein ,the shearing power is increased the strain on the hand of the operator correspondently reduced,

Theflinvention' consists in providing between one of the shear blades and its operat ing handle, communicating gearing whereby motion of the handle will be transmittedto in the manner hereinafter described. 1

-R eferring'to the drawings: Figure 1 is a View in front elevation of a shear constructed in accordance with my invention, showing "the shears closed. Fig; 2 is a plan view of Fig. 1. Fig. 3 is a view similar showing the shears open.

One of the shear memhers is continuous and preferably integral, similar to any ordinary shear, consisting of the shear hi middlebody portion or'baseg and, gripping handle 41, ter oval grip 5 of cardinal v we to Fig. 1, but

M stincticn. 6 is the other shearhlade pivotally mounted at '7 upon the rear-portion of hiade and provided with seg'rnentalseries of teeth 8 a radially arranged around thepivotai center 7, and of suiiicientgannularscope to for the fui desired travel of blade 6.

9 represents the operating handle for blade 6, provided like handle 4%, with a rin terminal 16, which. handle 9 is pivot mounted lji ii on the base 8, of the 0th. operatin de il er as shown, and provided. at its tor terminal with segmental series of teeth similar to the series 3,

Between teeth Sand 12, pivotaliy mount ed at 13 on a stud inserted in the shear IRE/Li her 3, like the mounting of pivot hearings .7 and 11, is an idler pinion 1a in mesh with teeth 8 and 10 respectively, and adapted to transmit motion to'handle '9 as will be readily provide understood. The pitch radii of teeth 12 and '8 respectively may be so proportioned as to secure the desired leverage depending on the work in view, the length of the blades, or any of the conditions controlling the use of the shears. v

By decreasing the radius of teeth 12 and may be increased with a corresponding re duction of blade travel, and by reversing these conditions, the travel of the blade may be increased with a corresponding reduction of power, I do not, however, desire to be in any Way limited to the proportionsfof these parts and it will be understood that they may be changed or varied by the skilled mechanic to suit the conditions of use and that the device may be otherwise modified without departure from the scope of the following claims.

What I clai ent is. j i

1. A shear consisting of a continuous handie and blade, a blade pivotally mounted at one side of said blade and handle, an independent o crating handle pivotally mounted and operahle on the continuous handle, and

and desire by Letters Pat gearing embodying an idler gear arranged to transmit motion from said handle to the pivoted blade. 7

A shear consisting of a continuous hanis, a blade pivotally mounted id the. l, nrovided with segmental teeth, an independent pivotally mounted handle erovided with segmental teeth of less radii than the hiade teeth, and an intervening idler gear meshing into the teeth. oi the blade and i'iandle respectively, substantially as set tcrth hination of a blade e ivotally mountovided with gear teeth, a :l l provided with octhed 1,. i -liiililBS 60. increasing the radius-of teeth 8, the leverage 

